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Commit 973c0191 authored by Keith Busch's avatar Keith Busch Committed by Jens Axboe
Browse files

blk-mq: Export if requests were started 



Drivers can iterate over all allocated request tags, but their callback
needs a way to know if the driver started the request in the first place.

Signed-off-by: default avatarKeith Busch <keith.busch@intel.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 3fd5940c

block/blk-mq.c

+6 −0
Original line number Diff line number Diff line
@@ -404,6 +404,12 @@ void blk_mq_complete_request(struct request *rq) 
}

EXPORT_SYMBOL(blk_mq_complete_request);



int blk_mq_request_started(struct request *rq)

{

	return test_bit(REQ_ATOM_STARTED, &rq->atomic_flags);

}

EXPORT_SYMBOL_GPL(blk_mq_request_started);



void blk_mq_start_request(struct request *rq)

{

	struct request_queue *q = rq->q;

include/linux/blk-mq.h

+1 −0
Original line number Diff line number Diff line
@@ -194,6 +194,7 @@ static inline u16 blk_mq_unique_tag_to_tag(u32 unique_tag) 
struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *, const int ctx_index);

struct blk_mq_hw_ctx *blk_mq_alloc_single_hw_queue(struct blk_mq_tag_set *, unsigned int, int);



int blk_mq_request_started(struct request *rq);

void blk_mq_start_request(struct request *rq);

void blk_mq_end_request(struct request *rq, int error);

void __blk_mq_end_request(struct request *rq, int error);